Human wins. Simply due to the massive size advantage a person would have. A human can also avoid a bird attack and if the bird dives for the person and the person avoids it and the bird gets grounded, its over.

Thanks, nice choices there King. Those must be a hell of deadly match-ups, no contenders will be able to survive without fatal damages and all of them can potentially be the ultimate champ. My choices as first round winners:

1) very tough call but I give it to Bamera, 2) Genghis, 3) Charger, 4) Waghdoh.

IMO the champion would be either Genghis or Charger. KZT23 and Waghdoh's sizes probably tower above the rest but these are/were all giant dominators and the size difference might not be so much of a winning factor as ferocity, athleticism, cunning & killing skills when it comes to such elite tigers as these. Genghis' intelligence/cunning and freakish athleticism that enabled him to operate incredibly sophisticated hunting tactics are legendary. He also could be so ferocious/agressive that charged against any obstacles, just like Charger.

If the weight difference is like >40-50kgs between Genghis and say KZT23 though, then its gonna be a different story.Just my opinion.

My take:

1=Bam 2=Genghis 3=Charge 4=Wagh5=Genghis 6=very tough call but I give it to Charge